Moon Phases
Seasons
Orbits & Gravity
Solar System
Lunar Cycle & Tides
100

When a moon is adding light, it is. 

What is a waxing?

100
When the it is summer in the northern hemisphere, it is this season in the southern hemisphere.

What is winter?

100

The Earth's moves in this type of orbit.

What is elliptical? 

100

This object is the center of our solar system.

What is the Sun?

100

The entire lunar cycle takes this many days to be complete.

What is 29.5?

200

This moon signals that 75% of the lunar cycle is complete.

What is a last quarter moon?

200

The primary cause of Earth's Seasons is this. 

What is the tilt of its Axis?

200

All objects that have mass will give off this non contact force.

What is gravity?

200

This model suggest that the Earth is the center of the solar system.

What is the Geocentric model?

200
During a full moon phase, this kind of tide will occur.

What is a spring tide?

300

When the moon is loosing light it is.

What is waning?

300

The north hemisphere is experiencing winter because it is receiving less of this. 

What is direct sunlight?
300

This is a day in our orbit in which we have the most sunlight.

What is a solstice?

300

The discovery of phases on this planet helps prove the heliocentric model. 

What is Venus?

300

When the moon is in a new moon phase, this phenomenon can potentially occur.

What is a solar eclipse?

400

Any moon that is less than half full is this kind of moon.

What is a crescent moon?

400

This movement is another factor that causes Earth's seasons.

What is Earth's revolution?

400

These are the two factors that impact gravity the most. 

What is mass and distance?

400

This model suggest that the sun is the center of our solar system. 

What is the Heliocentric model?

400

When the moon is either quarter moon phase, this tide can occur.

What is a neap tide?

500
This is the moon phase that begins the lunar cycle. 

What is a new moon?

500

This is the degree in which Earth is tilted.

What is 23.5 degrees?

500

This is the day in Earth's orbit in which the amount of day and night are the same. 

What is an equinox?

500

The planets appear to move in the sky against the backdrop of these distant space objects. 

What are the stars?

500

This type of eclipse happens when the Earth cast a shadow onto the moon.

What is a lunar eclipse?